Conditions of prayer in islam

Many people do not know the conditions of prayer and its nullifiers.

Conditions of prayer: They are nine: 

➊ Islam 
➋ Reason 
➌ Discernment 
➍ Removal of ritual impurity 
➎ Removal of impurity 
➏ Covering the private parts 
➐ The beginning of the time 
➑ Facing the Qiblah 
➒ Intention

Pillars of prayer: They are fourteen:

➊ Standing when able 
➋ Takbir al-Ihram 
➌ Reciting al-Fatihah 
➍ Bowing 
➎ Straightening up after bowing 
➏ Prostration on the seven limbs 
➐ And rising from it 
➑ Sitting between the two prostrations 
➒ Tranquility in all actions 
➓ The order between the pillars 
⓫ The final testimony 
⓬ Sitting for it 
⓭ And sending blessings upon the Prophet ﷺ 
⓮ And the two salutations

Obligations of prayer: They are eight: 

➊ All  Takbirs other than the Takbirat al-Ihram 
➋ And saying: “Allah hears those who praise Him” for the imam and the one praying alone 
➌ And saying: “Our Lord, to You be praise” for everyone 
➍ And saying: “Glory be to my Lord, the Almighty” in bowing 
➎ And saying: “Glory be to my Lord, the Most High” in prostration 
➏ And saying: “My Lord, forgive me,” between the two prostrations 
➐ And the first Tashahhud 
➑ And sitting for it

Explanation of the Tashahhud: 

▪#It is to say: “All compliments are due to Allah, and prayers and good things, peace be upon you, O Prophet, and the mercy and blessings of Allah, peace be upon us and upon the righteous servants of Allah, I bear witness that there is no god but Allah and I bear witness that Muhammad is His servant and Messenger” 

▪#Then he sends blessings upon the Prophet, peace and blessings be upon him, and says: “O Allah, send blessings upon Muhammad and upon the family of Muhammad, as You sent blessings upon Abraham and upon the family of Abraham, for You are Praiseworthy and Glorious, and bless Muhammad and the family of Muhammad, as You blessed Abraham and the family of Abraham, for You are Praiseworthy and Glorious.” 

▪#Then he seeks refuge in Allah in the last testimony from the torment of Hell, from the torment of the grave, from the trial of life and death, and from the trial of the Antichrist, then he chooses from the supplication whatever he wants, especially the well-known ones, including: O Allah, help me to remember You, thank You, and worship You properly. O Allah, I have wronged myself greatly, and no one forgives sins except You, so forgive me with forgiveness from You, and have mercy on me, for You are the Forgiving, the Most Merciful.

The things that invalidate the prayer: They are eight: 

➊ Intentional speech with remembrance and knowledge. As for the forgetful and ignorant, their prayer is not invalidated by that. 
➋ Laughing 
➌ Eating 
➍ Drinking 
➎ Exposing the private parts 
➏ Excessive deviation from the direction of the Qiblah. 
➐ Excessive and continuous fooling around in prayer. 
➑ Violation of purity.

Source: Sheikh: Abdul Aziz bin Baz, may Allah have mercy on him